No dumb or idiot questions here, maybe some dumb answers but that's another topic.

Now back to the question, you will not see a lot of glengarries being worn by civilians, mainly balmorals. It is alleged that dicing is usually for uniformed groups or military groups and plain (no dicing) for civilians. You will also find dicing on balmoral and the meaning of it is supposedly the same as glengarries. I pefer no dicing on my balmoral and I don't wear a glengarry.

Hope this helps. Cheers